基于智能手机的声波近场通信系统研究与设计

发布时间：2018-06-01 09:29

本文选题：声波近场通信技术 + 差分相移键控　；参考：《华南理工大学》2016年硕士论文

【摘要】：随着移动互联网的迅猛发展,智能设备已经成为人们日常生活的必需品,智能设备间的近距离互联的需求,使得近场通信技术得到合适的应用平台。在多种的近场通信技术之中,声波近场通信技术具有硬件成本低,使用方便等优点,能够广泛应用于移动支付、设备配对、小数据传输等场景中。而目前对声波近场通信技术研究相对较少,也没有统一的标准,具有广阔的研究空间,因此该技术具有比较大的研究意义,对其进一步的研究将有助于智能设备间近距离通信的发展。本文对声波近场通信技术进行了研究,做了以下几方面的工作:1.由于声波近场通信系统在信源与信宿中传递的是数字信号,所以声波近场通信系统属于数字通信系统。论文首先对数字通信系统整体的框架和流程进行了介绍,并研究了系统中的关键技术,包括信道编码技术、数字调制和解调技术等。2.在数字通信系统的基础上,论文对基于智能手机的声波近场通信系统的框架和通信流程进行了设计。3.在系统的调制方式的选择上,参考水声通信系统使用DPSK和OFDM调制技术对声波信号进行调制,分别设计了DPSK和OFDM两个系统,并对两个系统进行了仿真,确定了有效的调制解调方法。4.在Android系统上完成了声波近场通信系统的开发,实现了信号从发送端到接收端的整个通信流程,发送端流程包括基带信号的产生,卷积码的编码,DPSK和OFDM信号的调制,控制扬声器发出声波信号;接收端流程包括控制麦克风接收声波数据,DPSK和OFDM信号的解调,维特比算法对卷积码的译码。整个系统使用JAVA编程语言编写,并用面向对象的程序设计思想对系统进行架构。5.论文最后对所开发的软件进行了性能测试,测试结果准确有效,表明所开发的声波近场通信系统能够完成智能手机间的近距离通信的功能,操作简单,便于推广使用,具有较高的应用价值。
[Abstract]:With the rapid development of mobile Internet, intelligent devices have become a necessity of daily life, and the need of close interconnection between intelligent devices makes the near field communication technology get suitable application platform. Among various near-field communication technologies, acoustic near-field communication technology has the advantages of low hardware cost and easy to use. It can be widely used in mobile payment, equipment matching, small data transmission and other scenarios. At present, the research on acoustic near-field communication technology is relatively few, and there is no unified standard, so it has a broad research space, so this technology has a relatively large research significance. Further research on it will be helpful to the development of close-distance communication between intelligent devices. In this paper, the acoustic near field communication technology has been studied, and the following work has been done: 1. Acoustic near-field communication system is a digital communication system because it transmits digital signals between the source and the receiver. Firstly, the whole framework and flow of digital communication system are introduced, and the key technologies in the system are studied, including channel coding technology, digital modulation and demodulation technology, etc. On the basis of digital communication system, this paper designs the framework and communication flow of sonic near field communication system based on smart phone. In the selection of the modulation mode of the system, the acoustic signal is modulated by DPSK and OFDM modulation technology. The DPSK and OFDM systems are designed, and the two systems are simulated. The effective modulation and demodulation method. The development of acoustic near-field communication system is completed on Android system, and the whole communication flow from the transmitter to the receiver is realized. The flow of the transmitter includes the generation of baseband signal, the modulation of the convolutional code coding DPSK and the OFDM signal. The receiver includes the demodulation of DPSK and OFDM signals by the microphone, and the decoding of convolutional codes by the Viterbi algorithm. The whole system is written with Java programming language, and the structure of the system is constructed by object oriented programming. Finally, the performance of the developed software is tested, and the test results are accurate and effective. The results show that the developed acoustic near field communication system can complete the function of close communication between smart phones, which is easy to operate and easy to popularize. It has high application value.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN929.53;TN914.3

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